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Oolitic WWTP

Sewage treatment plant, Oolitic, Indiana. NPDES permit IN0023981, in force until May 31, 2027. Last 12 months: over a limit 9 times (last August 2026), 8 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (19 values)
Renewal application due
Dec 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
13 values over a limit, 0 required values missing, 2 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], monthly average2.9 mg/L≤ 1.24 mg/L134%
October 2025Nitrogen, ammonia total [as N], maximum weekly average5.44 mg/L≤ 1.79 mg/L204%
November 2025Nitrogen, ammonia total [as N], monthly average3.8 mg/L≤ 1.24 mg/L206%
November 2025Nitrogen, ammonia total [as N], maximum weekly average8.2 mg/L≤ 1.79 mg/L358%
January 2026Nitrogen, ammonia total [as N], maximum weekly average3.67 mg/L≤ 2.69 mg/L36%
February 2026Nitrogen, ammonia total [as N], monthly average2.06 mg/L≤ 1.79 mg/L15%
February 2026Nitrogen, ammonia total [as N], maximum weekly average5.95 mg/L≤ 2.69 mg/L121%
August 2026Nitrogen, ammonia total [as N], monthly average1.5 mg/L≤ 1.24 mg/L21%
August 2026Nitrogen, ammonia total [as N], maximum weekly average4.2 mg/L≤ 1.79 mg/L135%

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily average minimum≥ 6 mg/LMay–Nov
Oxygen, dissolved [DO]daily average minimum≥ 5 mg/LJan, Feb, Mar, Apr, Dec
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 88 lb/dall year
Solids, total suspendedmaximum weekly average≤ 131 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 1.24 mg/LMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 1.79 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 1.79 mg/LMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 2.69 mg/LJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]monthly average≤ 3.6 lb/dMay–Nov
Nitrogen, ammonia total [as N]monthly average≤ 5.2 lb/dJan, Feb, Mar, Apr, Dec
Nitrogen, ammonia total [as N]maximum weekly average≤ 5.2 lb/dMay–Nov
Nitrogen, ammonia total [as N]maximum weekly average≤ 7.9 lb/dJan, Feb, Mar, Apr, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. coli, colony forming units [CFU]monthly geometric mean≤ 125 CFU/100mLApr–Oct
E. coli, colony forming units [CFU]daily maximum≤ 235 CFU/100mLApr–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 73 lb/dall year
BOD, carbonaceous [5 day, 20 C]maximum weekly average≤ 117 lb/dall year
Flow, totalmonthly totalreport only (Mgal/mo)all year

How strict are these limits?

Cited limits by parameter: Indiana's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IN0023981 · MCP: https://passage-data.com/mcp